help with dss331

76bronco · Nov 27, 2006

I am new to this forum. I have a 76 bronco and put a dss 331 bullet short block in last week. I have trick flow twisted wedge heads, an e cam advanced 4 degrees to lower the power in the rpm band. a stock 5.0 intake w/19# injectors. An x pipe with no cats. The engine should be around 10.5 compression according to dss with the twisted wedge heads. I have the timing set at 4 degrees right now with the spout unplugged. I smell fuel at an idle and it does not pull quite as well as I expected. The egr is bypassed and has an egr eliminator built into the RJM harness. I thought I would need 24# injectors and it does seem to lean out at higher rpm but I can really smell gas at idle. No codes except egr not working because of the bypass. I have the stock fpr and msd fuel pump. new o2's. Any idea what could cause the fuel smell at idle and should I get 24# injectors and new mass air calibrated for them. Thanks for any help

86bluecobra · Nov 28, 2006

is the gas smell coming from the exhaust or could it be you have a leak somewhere?

76bronco · Nov 28, 2006

it is the exhaust. The plugs looked good though.

76bronco · Nov 28, 2006

RYC CUKR · Nov 28, 2006

Not sure exactly might be causing the fuel smell but I would say that the stock intake is to small for a 331. Its a bottleneck on the 5.0s so on a 331 I would imagine it becomes more noticable. If you are on the cheap find an explorer intake and swap it out. Since you have no EGR anyway any year explorer intake will work for you, the later years I believe 98 and up do not have the provision for the internal EGR passages.

fastranger347 · Nov 28, 2006

try bumping your timing up to 14* with the spout disconected, your lazy timing could be causing improper combustion and unburnt fuel to be dumped out of the pipes

76bronco · Nov 30, 2006

Thanks for the replies. I will try the timing. Would a cobra or gt 40 intake be better for this combo?

86bluecobra · Nov 30, 2006

On a 302 the factory intake is a bottle neck. Now you have more cubic inch's to fill with air and fuel mixture so the factory intake becomes more of a bottle neck. The holley systemax II intake is a very nice piece. what TB do you have? just stock? think bout up grading that aswell.

76bronco · Dec 1, 2006

it's a 65mm ford performance would that be ok with the systemax intake

TC93 · Dec 1, 2006

fastranger347 said:
try bumping your timing up to 14* with the spout disconected, your lazy timing could be causing improper combustion and unburnt fuel to be dumped out of the pipes

My thoughts exactly... 4* is way low. Plus will also be the " not pulling quite like it should", problem.

Rick 91GT · Dec 3, 2006

Myke86GT said:
My thoughts exactly... 4* is way low. Plus will also be the " not pulling quite like it should", problem.

I agree sounds like it is not burning all the fuel.....it surprises me the plugs look good.

310stanger · Dec 3, 2006

bump up the timing when it starts to ping jus a lil bump it back till it stops for starters. Second chuck the stock intake for something better like a trickflow or holley systemax, get 24 lb injectors with calibrated mass air. With a 331 and twisted wedge heads that motor is starving with your current induction.

BlownFiveLiter · Dec 3, 2006

310stanger said:
bump up the timing when it starts to ping jus a lil bump it back till it stops...

^ Don't do that. More timing doesn't necessarily mean more power and pinging could lead to replacing headgaskets. I've had base timing as high as 18° with no pinging on 93 octane, but I doubt my engine was making optimum power with that much timing.

76bronco · Dec 3, 2006

thanks for the info. which intake would provide the best low end torque and still let the engine breath.

88Stang331 · Dec 4, 2006

I would look no further than Holley or Edelbrock for a good intake.

TC93 · Dec 4, 2006

For a budget intake could get an explorer or cobra intake. But like mentioned above an E-brock or Holley are good choices, and don't rule out the tried & true GT-40.

strker347 · Dec 5, 2006

Holley systemax ll, TFS-R intake, SVO 24lbers, 70mm Accufab TB, 73mm C & L MAF, custom burned chip. the stock computer still thinks there is a 302 there and will not compensate for increase in cubic inches or in A/F ratio. U run the risk of being too rich which washes out the rings and glazes the cylinder walls, or running too lean, pinging and detonation.

MyLittlePony90 · Dec 5, 2006

Have you had your motor tuned, the stock computer usually cannot run properly with mods, also if you dont want to spend a lot for an intake look for 97,98 explorer v8 intake is really good for stock intakes.

76bronco · Dec 6, 2006

no one around here does chip burning. Who would you recommend for that. Can the do it over the phone just telling them the parts in the engine?

76bronco · Dec 7, 2006

help with dss331

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